$ git clone -n https://src.fedoraproject.org/rpms/perl-Locale-Utils-PlaceholderMaketext.git /var/lib/mock/f39-build-1451513-32815/root/chroot_tmpdir/scmroot/perl-Locale-Utils-PlaceholderMaketext
Cloning into '/var/lib/mock/f39-build-1451513-32815/root/chroot_tmpdir/scmroot/perl-Locale-Utils-PlaceholderMaketext'...
$ git fetch origin 4313e98c8bd3c04760debd9d18ac2524552e7edb:KOJI_FETCH_HEAD
warning: unable to unlink '/var/lib/mock/f39-build-1451513-32815/root/chroot_tmpdir/scmroot/perl-Locale-Utils-PlaceholderMaketext/.git/refs/heads/KOJI_FETCH_HEAD.lock': Read-only file system
error: couldn't set 'refs/heads/KOJI_FETCH_HEAD'
From https://src.fedoraproject.org/rpms/perl-Locale-Utils-PlaceholderMaketext
 ! [new ref]         4313e98c8bd3c04760debd9d18ac2524552e7edb -> KOJI_FETCH_HEAD  (unable to update local ref)
$ git reset --hard 4313e98c8bd3c04760debd9d18ac2524552e7edb
fatal: Unable to create '/var/lib/mock/f39-build-1451513-32815/root/chroot_tmpdir/scmroot/perl-Locale-Utils-PlaceholderMaketext/.git/index.lock': Read-only file system