$ git clone -n https://src.fedoraproject.org/rpms/tmt.git /var/lib/mock/f39-build-1705868-41219/root/chroot_tmpdir/scmroot/tmt
Cloning into '/var/lib/mock/f39-build-1705868-41219/root/chroot_tmpdir/scmroot/tmt'...
$ git fetch origin 24e4a067147d0067df8ef30a92395bc2495dee26:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/tmt
 * [new ref]         24e4a067147d0067df8ef30a92395bc2495dee26 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 24e4a06 [packit] 1.29.0 upstream release