$ git clone -n https://src.fedoraproject.org/rpms/rust-uuid.git /var/lib/mock/f38-build-side-42-init-devel-1394804-31050/root/chroot_tmpdir/scmroot/rust-uuid
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-1394804-31050/root/chroot_tmpdir/scmroot/rust-uuid'...
$ git fetch origin adcd6307fa041b9bace2bbfd9de616a8271e1f3c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-uuid
 * [new ref]         adcd6307fa041b9bace2bbfd9de616a8271e1f3c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at adcd630 Update to version 1.4.1; Fixes RHBZ#2223255