$ git clone -n https://src.fedoraproject.org/rpms/rubygem-guard-compat.git /var/lib/mock/f40-build-2322796-58681/root/chroot_tmpdir/scmroot/rubygem-guard-compat
Cloning into '/var/lib/mock/f40-build-2322796-58681/root/chroot_tmpdir/scmroot/rubygem-guard-compat'...
warning: unable to unlink '/var/lib/mock/f40-build-2322796-58681/root/chroot_tmpdir/scmroot/rubygem-guard-compat/.git/config.lock': Read-only file system
error: could not write config file /var/lib/mock/f40-build-2322796-58681/root/chroot_tmpdir/scmroot/rubygem-guard-compat/.git/config: Read-only file system
fatal: could not set 'core.filemode' to 'true'