$ git clone -n https://src.fedoraproject.org/rpms/perl-Module-Implementation.git /var/lib/mock/f45-build-24810-606/root/chroot_tmpdir/scmroot/perl-Module-Implementation
Cloning into '/var/lib/mock/f45-build-24810-606/root/chroot_tmpdir/scmroot/perl-Module-Implementation'...
$ git fetch origin 50bb22739f1c7d228212e59d0f3b2c6d31ddb409:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Module-Implementation
 * [new ref]         50bb22739f1c7d228212e59d0f3b2c6d31ddb409 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 50bb227 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild