$ git clone -n https://src.fedoraproject.org/rpms/perl-ccom.git /var/lib/mock/f45-build-27617-625/root/chroot_tmpdir/scmroot/perl-ccom
Cloning into '/var/lib/mock/f45-build-27617-625/root/chroot_tmpdir/scmroot/perl-ccom'...
$ git fetch origin 1609896fc566b417a16be2242048e8e4a15f1289:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-ccom
 * [new ref]         1609896fc566b417a16be2242048e8e4a15f1289 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1609896 Perl 5.44 rebuild