$ git clone -n https://src.fedoraproject.org/rpms/perl-Socket.git /var/lib/mock/f45-build-26239-616/root/chroot_tmpdir/scmroot/perl-Socket
Cloning into '/var/lib/mock/f45-build-26239-616/root/chroot_tmpdir/scmroot/perl-Socket'...
$ git fetch origin 5a09fd9148da850bb498090f566f5ff5d23621c0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Socket
 * [new ref]         5a09fd9148da850bb498090f566f5ff5d23621c0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5a09fd9 2.043 bump (rhbz#2518011)