$ git clone -n https://src.fedoraproject.org/rpms/xset.git /var/lib/mock/f45-build-39124-732/root/chroot_tmpdir/scmroot/xset
Cloning into '/var/lib/mock/f45-build-39124-732/root/chroot_tmpdir/scmroot/xset'...
$ git fetch origin 3ad5d106b8cbddc0f01dcf637c19bf59299d281f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/xset
 * [new ref]         3ad5d106b8cbddc0f01dcf637c19bf59299d281f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3ad5d10 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild