$ git clone -n https://src.fedoraproject.org/rpms/64tass.git /var/lib/mock/f40-build-2197156-51636/root/chroot_tmpdir/scmroot/64tass
Cloning into '/var/lib/mock/f40-build-2197156-51636/root/chroot_tmpdir/scmroot/64tass'...
$ git fetch origin abf0691593b2ae2fc967da6577c64fb1d269af48:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/64tass
 * [new ref]         abf0691593b2ae2fc967da6577c64fb1d269af48 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at abf0691 convert to SPDX