$ git clone -n https://src.fedoraproject.org/rpms/perl-String-ShellQuote.git /var/lib/mock/f40-build-2630538-65677/root/chroot_tmpdir/scmroot/perl-String-ShellQuote
Cloning into '/var/lib/mock/f40-build-2630538-65677/root/chroot_tmpdir/scmroot/perl-String-ShellQuote'...
$ git fetch origin c0a5a763b07a91f61fdf75acd73a6a9d79a2b1b3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-String-ShellQuote
 * [new ref]         c0a5a763b07a91f61fdf75acd73a6a9d79a2b1b3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c0a5a76 Package tests