$ git clone -n https://src.fedoraproject.org/rpms/libtrash.git /var/lib/mock/f45-build-17135-496/root/chroot_tmpdir/scmroot/libtrash
Cloning into '/var/lib/mock/f45-build-17135-496/root/chroot_tmpdir/scmroot/libtrash'...
$ git fetch origin 43f51899f3b7b8af68f92601d142ad76a59419d2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libtrash
 * [new ref]         43f51899f3b7b8af68f92601d142ad76a59419d2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 43f5189 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild