$ git clone -n https://src.fedoraproject.org/rpms/umockdev.git /var/lib/mock/f42-build-3339761-41426/root/chroot_tmpdir/scmroot/umockdev
Cloning into '/var/lib/mock/f42-build-3339761-41426/root/chroot_tmpdir/scmroot/umockdev'...
$ git fetch origin 86244a0317082905e96e6a0e510d150554ae4ed2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/umockdev
 * [new ref]         86244a0317082905e96e6a0e510d150554ae4ed2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 86244a0 Rebuilt for https://fedoraproject.org/wiki/Fedora_42_Mass_Rebuild