$ git clone -n https://src.fedoraproject.org/rpms/rust-dashmap.git /var/lib/mock/f40-build-2081541-49770/root/chroot_tmpdir/scmroot/rust-dashmap
Cloning into '/var/lib/mock/f40-build-2081541-49770/root/chroot_tmpdir/scmroot/rust-dashmap'...
$ git fetch origin e0bc3388807466b328b9dfc45deb432623cd898b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-dashmap
 * [new ref]         e0bc3388807466b328b9dfc45deb432623cd898b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e0bc338 Update to version 5.5.3; Fixes RHBZ#2235643