$ git clone -n https://src.fedoraproject.org/rpms/perl-IO-Socket-Multicast.git /var/lib/mock/f45-build-24201-602/root/chroot_tmpdir/scmroot/perl-IO-Socket-Multicast
Cloning into '/var/lib/mock/f45-build-24201-602/root/chroot_tmpdir/scmroot/perl-IO-Socket-Multicast'...
$ git fetch origin a3cf3231e8bcadd0e024a1ed2ffd55568b617094:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-IO-Socket-Multicast
 * [new ref]         a3cf3231e8bcadd0e024a1ed2ffd55568b617094 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a3cf323 Perl 5.44 rebuild