$ git clone -n https://src.fedoraproject.org/rpms/perl-Glib.git /var/lib/mock/f40-build-2229428-53147/root/chroot_tmpdir/scmroot/perl-Glib
Cloning into '/var/lib/mock/f40-build-2229428-53147/root/chroot_tmpdir/scmroot/perl-Glib'...
$ git fetch origin 91cbfc5b28d1a963dd0c4294d48bfaa77910763c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Glib
 * [new ref]         91cbfc5b28d1a963dd0c4294d48bfaa77910763c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 91cbfc5 1.3294 bump (rhbz#2235632)