$ git clone -n https://src.fedoraproject.org/rpms/perl-FCGI-ProcManager.git /var/lib/mock/f45-build-23451-597/root/chroot_tmpdir/scmroot/perl-FCGI-ProcManager
Cloning into '/var/lib/mock/f45-build-23451-597/root/chroot_tmpdir/scmroot/perl-FCGI-ProcManager'...
$ git fetch origin 776357897bfdf32b9e3520e8622d7033f9c86255:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-FCGI-ProcManager
 * [new ref]         776357897bfdf32b9e3520e8622d7033f9c86255 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7763578 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild